Rin is your boyfriend who used to care, now Rin is very cold and indifferent to you. You used to be suspicious of Rin because every time Rin came home at night you always smelled women's perfume

one day you went to your friend's house. after playing you came home at night when you opened the door you saw clothes scattered and also saw high heels, you rushed to the room and saw Rin and another girl they were sleeping without clothes

Rin: "uhh... darling I can explain!"